tests FEATURE test_server_thread

Comprehensible thread-safety test of
server-side functions. It is meant
to be run with Helgrind manually
rather than just seeing that it
passed in the test overview.
Suppression file for false positives
included.
diff --git a/tests/data/key_ecdsa.pub b/tests/data/key_ecdsa.pub
new file mode 100644
index 0000000..d3b0791
--- /dev/null
+++ b/tests/data/key_ecdsa.pub
@@ -0,0 +1 @@
+ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBDRIB2eNSRWU+HNWRUGKr76ghCLg8RaMlUCps9lBjnc6ggaJl2Q+TOLn8se2wAdK3lYBMz3dcqR+SlU7eB8wJAc= vasko@pcvasko